Nonlinear optical effects and devices

Losses of high-intensity optical radiation in transparent nonlinear media

A. N. Matveev, I. Yu. Pirogova, L. S. Telegin, A. S. Chirkin


Abstract: One of the possible mechanisms of loss of energy by high intensity optical radiation in media with a quadratic nonlinearity is considered. The source of losses is nonphase-matched secondharmonic generation when the doubled frequency lies within an absorption region of a crystal. A detailed study is reported of the influence of absorption at the second-harmonic frequency on the propagation of the fundamental-frequency wave for different ratios of the characteristic lengths (absorption, nonlinear, coherence, and quasistatic). It is shown that in some cases nonlinear losses of the fundamental-frequency radiation may be considerable and can limit the efficiency of phase-matched nonlinear optical processes.

UDC: 621.373.826

PACS: 78.20.Ci, 42.70.Mp, 42.65.Ky, 42.50.Gy

Received: 12.03.1986

 English version: Soviet Journal of Quantum Electronics, 1987, 17:4, 473–477

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